Riza - Safely run untrusted code from your app

In plain words

Riza is an API for safely executing untrusted code within sandboxed WebAssembly environments. It provides HTTP access to dynamic language interpreters that run in isolation without external system access, designed for developers who need to run code generated by language models or other untrusted sources. The service targets developers building applications requiring secure code execution capabilities.

written from the facts on this page · September 2026

From the sources

Riza is the production-ready isolated runtime for untrusted code.

LLMs can write code, but can’t safely execute their code without human review and make their code reusable. Riza provides the AI-first infrastructure that makes agents more capable, reliable, andfrom riza.io

In the maker’s words, at launch

Hi HN, I’m Kyle and together with Andrew (https://news.ycombinator.com/user?id=stanleydrew) we’ve been working on Riza (https://riza.io), a project to make WASM sandboxing more approachable. We’re excited to share a developer preview of our code interpreter API with HN. There’s a bit of a…

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  Riza2024 · riza.io · ▲3

  Safely run untrusted code from your app.

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  YepCode2022 · yepcode.io · ▲157

  Hey HN, We’re excited to introduce YepCode Run, a serverless runtime and SDK for executing code in secure sandboxes. Built on top of YepCode (https://yepcode.io), it allows you to execute code without any setup or installation. Perfect for: * Running AI-generated code – Securely in a sandbox environment, enabling fully autonomous AI agents. * Package Exploration – Try npm or PyPI packages without installing them locally. * Code Sharing – Easily share runnable code examples with others. * Quick Prototyping – Test snippets and algorithms on the fly. Just write or paste your code, and…

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  Sandboxing untrusted code using WebAssemblyFeb 2026 · github.com · ▲76

  Hi everyone, I built a runtime to isolate untrusted code using wasm sandboxes. Basically, it protects your host system from problems that untrusted code can cause. We’ve had a great discussion about sandboxing in Python lately that elaborates a bit more on the problem [1]. In TypeScript, wasm integration is even more natural thanks to the close proximity between both ecosystems. The core is built in Rust. On top of that, I use WASI 0.2 via wasmtime and the component model, along with custom SDKs that keep things as idiomatic as possible. For example, in Python we have a simple decorator:…

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  VELAJun 2026 · vela-secure.vercel.app · ▲74

  Securely execute AI-generated & untrusted code

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  Sandy – A tiny Sandbox to run untrusted code ️2020 · github.com · ▲64

  A tiny "sandbox" to run untrusted code 🏖️. Contribute to craigmulligan/sandy development by creating an account on GitHub.

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  Execute JavaScript in a WebAssembly QuickJS sandbox2024 · github.com · ▲206

  This TypeScript package allows you to safely execute JavaScript code within a WebAssembly sandbox using the QuickJS engine. Perfect for isolating and running untrusted code securely, it leverages the lightweight and fast QuickJS engine compiled to WebAssembly, providing a robust environment for code execution. Features - *Security*: Run untrusted JavaScript code in a safe, isolated environment. - *File System*: Can mount a virtual file system - *Custom Node Modules*: Custom node modules are mountable - *Fetch Client*: Can provide a fetch client to make http(s) calls - *Test-Runner*: Includes…

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